Pneumatic device eor cleaning



stande'rs'.' f n The invention.r consists 1n provlding 1an.

` vement Yhand grip g,

" -Figurejshows a central,Y

Patented Nov. 6, 1923.V

f CHARLES Louis CONE, c )nisfrtoussnai),Leursheim. :f Yf. ff. n

PNEUMTIIC DEvicE rvnrorineivriverounnautres,

Application lpedfNoveibrer Toall whomimay concem: Y

Be it known that I, 'CHAmiEsQLoUiS CoRNE,a citizen ofthe United Statest residing atBroussard, inA the'parish of Lafayette and State ofLouisiana, haveinvented certain. new and useful Improvements in Pneu#v matic Devices for Cleaning Boiler Tubes, of -t which f the vfollowing is a specification,

My vpresent invention` relates to impro-vementsy in afpneumatic' device Yforcleaning out f fire tub'e `hoilers,"s ruoke stacks, chimneys, or. the l i ke, subjecting the passage to be cleaned to a sudden lolastV of ai'r lorl other gas under'high, pressure. "While steain or othergas under high pressure .may be used,

compressediair is preferred because it Vcan .be-

easily-Secured vand can be handledv without any Yda-1`1,: er` of injuryttov the luser lor lbyappliance,l as will be hereinafter described,

in Which Ia suiicientvolume of Vcompressed air may loeV stored and 'Suddenly` released j' througha contracted orifice, creating a very strong draft intheE passageway to be cleaned out," .and` causing fthey soot vand other solid particles to forinfinf'eii'ect aY pistony Which Willscour out the'passa'ge when pressure suddenly applied.

For brevity offdescription I havecalled the device a pneumatic gun, since itoper` ates on the saine general principle asa gun, but Without any! `pro]ecti1e other vthan 4the imprisoned/gas. t e' My' invention' will loemore fully .understood after reference tothe accompanying drawings, in which: like/partsl are indicated by similarfreference symbols .throughout vthe Y several views, and in which Figure lY is'a planfvievv showlngfthe corn-v pleteapp Vtus in full lines,"withj'the 'deliv` ery" ,hse 'sho'wui in dottedlineal; i Y e ertical section thpughfrig-.gi amg the :une Ofi Said ligure; with" thevallve close'd, and parts of the :gr-un f i'ifiLIthe-ocked position i and g Figure@ isa similar vievv-to Figlfhhut Dartspfthe gun in fthe,corresponding kforiisles@diisios1f1 n:.z,,V i Y i representsacylindrical harrehadapted nozzle opening and, hose'B 'indicat'edlin dotted Vlinesfin Fig, 2." `Suitalole' means (not shown) fon turning and .cutting Off the 'ghe adopted, but a rubber ball may befcon- Y kSomme kif Suppiy Offfiuiafpresug Teeny@ j I f course,i be provided." Y

i The lo'ar'relfA fs closed ,wat end 'why theannularfhead C' termii ratingfin` the 60 cylindrical'projection'GQ Vwhich"servesasl a passage for the escaping airy and; -to'vvliich5 ;j I

the nozzle D attached, as loyY screvv'ingonr V as atalr;V The bore ofthis no'Z'Zleris preferably enlarged, as,` at' do, tofy permitfjclearance around the Vvalve when itY is released, i andy is :taperedr` inwards-"asi at d'.-

The other end olf the cylinderV Afisiclosed` 5 by thefjhead which isf providedwth'f-a ,glandv enfor'thel valve rod, L andvlvith a 'grip piece e', preferably provided with ifla'ngese?, tokk Which the sideplateszli' andFf "ofwtlieY n stock are connected.:V These 'sidefpl'atesvare connected at their rear` ends4 to. the'- shoulder' Y pieceorhuttl of the'stock G, -vvhich-isapro# videdvvith the o-pfni'ng g''to forni through the `iglfafnd eiandcarrriesgnear lits forward end thefvalve I, Whichi's' preferably 80. vIliade of ru'bbrfi Ol'fthe like, 'in'- ihf'fm OfV Y a ball, and is'hel'd Vvinplace '.byfmean's ofthe A CrossiharMfandlthe vnut hf'screwedonthe i rearendof the' valve rodi-Ill; By settinglup'`- j on thisn'ut .z'the compression ofthe s 'ring l, g1 i f i; maybe:miediwahin limits as deel d= 1 The YSear blockL N'my bei o'faay c011` venient shape, but ris vsli'cnvjiV in theffoifrn'oifa id isk journaled on fthe pivotpin-O" extedilfg laerossth'e;steek. Thi-estar bleekis attenta;

f? z if :1,47 I

H represents "the: 'valve-rodvvhichfslides if." f: l

notch n; but if desired a trigger'spring (not shown) may be introduced to cause the trigger to positively engage the sear block.

The nozzle D may be directly inserted in the tube or passageway to be cleaned out, and for convenience of operation I prefer'- ably attach to the nozzle end of the gun a hose S having a small nozzle D which may be forced tight into the boiler tube.

The operation of the device is as follows:

Suppose the barrel A to be supplied with air yoi' other fluid under pressure, and the parts to bein the position shown `in Fig. 2, the valve being closed by the compression of the safety spring K which overcomes the pressure of the fluid on the valve, to fire the gun, insert the nozzle D orV D', as the case ,may be,in thetube or passageway to be cleaned and pull the trigger P. This will reunder thepressure exerted by the compressed airy .on the valve. 'Ihe valve will quickly vopen and the cushion spring J will be .compressed, lessening the shock which would normally occurV when the valve is suddenly opened.- Y.The parts will now assume the positionshown in Fig. 3.and will remain in that position as long as the fluid pressure is supplied to the cylinder A.

When the operation is completed, turn off the fluid pressure and insert the cocking bar R in the socket a and restore the parts to the initialv position shown in Fig. 2, when the j nose prof the trigger will engage in the notch a in the sear block N and the un will become, cocked with the valve c osed again. It. will be obvious that the cocking bai` R may be permanently connected to the sear block, but for convenience of use I prefer to havey this bar a separate member which may be attached to the gun as by a chain, or carried `entirely separate from the gun. Any metal bar of proper dimensions will be suitable for this purpose.

It will be seenthat the device is protected against excessive pressures occurring in the barrel A by means of the safety spring K which is set to the desired degree of compression as before described. When the pressure inthe barrel exceeds a predetermined limit, the pressure on the yvalve yI will exceed the retractive" forcey of the safety springiK and thevalve will openp'artly, relieving the pressure in the barrel A'. It will ythus be noted that this valve I is held on its seat by an arrangement which will yield and permit the valve to open when thepressure in thebarrel becomes excessive.

The gun may be 1 applied to Ycleaning out smoke stacks of various kinds, chimneys or the likefwhere a sudden rush of air will blow loose the soot and solid matter accumulating on the walls of the passageway; but the invention is especially effective for cleanrious kinds maybe attached to the=hose S for making al tight fit with firey tubes of variouskinds which may be found vin fire tube boilers. Where the device is used ina smoke stack or chimney it is not essentialto make a tight joint, as av rush of air occasioned by firing the gun will accomplish the@y .desired result in a satisfactory way; 4 lease the sear block and the cocking yoke', and will permit the cocking yoke to fly forwards It willrbe obvious that various changes inightjbe made inthe construction, combination and arrangement yot vparts which could be used without departing from thespirit` e kticularly pointed out inthe claims.v

rkof my invention; and I do not mean tolimit the inventionto such details except aspar- 90 Having thus described my invention what l. A pneumatic gun for cleaning out tubes vof boilers, comprising a cylindrical Vbarrel with means for supplying compressed air to same, a head mounted' in one end "of said,` Ybarrel and provided with a nozzle, a'second head vclosing the opposite end ofV said barrel and vprovided with a packingl gland, a stock connected to said second head, a valveV rod I claim and desire to Asecure by Letters`Pat-- ,I ent of the United States is:

passing through said b aiiel and said gland..LA

iio

mally engaging said sear block to hold the valve rod in the retracted position, and a safety spring normally pressing said.valve,v`

rod rearward in said yoke to keep the valve closed, but yielding to open said valve when i the pressure in the barrel becomes excessive;

2. A pneumatic gun.. for cleaning outjtubes v .i

rel and providedA withV a nozzle, a second Vof boilers, ,comprising a cylindricalibarrel., with means. for supplying compressed' air to same, a head mounted in oneend of saidbarhead closing the opposite end of said barrel and provided with a Vpacking gland, a stockt...y connected to said second head, a valve rod passing throughY said barrel'and said gland, a valve mounted on said rod 'near one end thereof/and adapted to close said nozzle, a

Yoke having a cross bar slidably mountedfon said rod nearv the other end thereof,a`

notched sear block journalled in said stock thelv'alve rod inV theretracted position, andy a Vthe said safetyspring-pressing forwardson and pivotallycormected` to the arrrrsoi saidfY yoke, a trigger pivoted to said* stockf'andnormally -engagingf said' Sear'. block` to* hold said cross bar, with a cushion spring engag- 1 ing the' opposite sideV of-said crossjbarg'to Y lessen the shock whensaid trigger is released yand provided with apacking gland, astock and Vsaid valve `flies forward under :pneumatic pressure. 3. Al pneumatic gun orcleaning out tubes of boilers, comprising af' cylindrical .barrell with means for-supplying compressed air toi same, ahead mounted in one end of said barrel and 'providedwith' Va nozzle, aY second head closing the opposite end voi? said barrel 1 connectedjto 'said' second head, a valve? rod passing through said barrelland' said gland, a vvalve mounted on said rodnear voneend thereoffand adapted toA close said nozzle', af yokehaving a cross bar slidablyInounted'on.v said rod near the other end thereof., a notchedsear block journaled in said Ystock andfpivotally connected to fthe arms of said yoke, a trigger pivotedL to said stock and normally engaging said sear yblock to hold the valve rod in the retracted position, .a cooking barV adapted to rock said sear block to the cocked position, and a safety spring normally pressing said valve rod rearward in said yoke to keep the valve closed, but yielding to open said valve when the pressure yin the `barrel becomes excessive. f Y

4. A pneumatic gun for cleaning out tubes( otboilers, comprising a. cylindrical barrel with means for supplying compressed air to same, a head mounted in one end of said bar rel and provided with a nozzle, a second head closing the opposite end Vof said barreland provided with a packing gland, a stock con-V-l nected to said secondhead, a valve rod passincry through said barrel and said gland, a va ve mounted on said rod near one end thereof and adapted to close. said nozzle, a yoke having a cross bar slidably mounted on said rod near the other yend 'thereo-f, a notched sear Vblock journaled-in said stockV and pivotally connected to vthe-armsof said yoke, a triggerpivoted'to said stock and normally engaging said' sear block:- toY hold'V the valve rod inV the retracted position, a'v cooking bar'adapted to rock said sear blockto the cocked,position,"and afsafety spring normally pressing said valve. rod rearward in said yoke to keep the valveclosed, butV yielding to openV saidvalve'rwhen the pres-y sure in the barrelbecomes.excessive, the said` safety spring pressing forwards j oni said: cross bar, withra cushion springengagingYV the opposite side of .said cross bar, toflessen saidrV valve flies; orward *under the shock whrsaidariggef medaglia-.andi

5. A pneumaticgun 'd ofi. fboilers,f comprising V a cylindrical barrel with Vmeans forisupplying*.compresseds'airtd Y at fits outer fend withal tapered' nozzle adapt-f' Vsame,a,headmunted.inone'endFotsaidbarff Y, rellandprovided with la-nozzle, a iiexible ij heseconnected'to' said 'nozzle and?provided.V

fed to fltin the vtuberto be cleanedfa second gi .head closing the opposite-endof said --bajrreljA y land provided with al',l packing"giand,"a' stock connected to-saidsecondfheadfa valvej .rod passing through Said-,barrel 1 and "said."y gland, a Valve mounted oni; Said rod near @one gend -thereoff and f-.adaptedf -tofrfc'lose l. said nozzle, al yoke"`liaving`==a fc'ross;`

bari slidably mount'edfon said rod-#near the other e end thereof, 1notchegilzfsear'fV -b'lock journaledin fsaidfst'o'ck andpiyotal'ly., connected Lto the arms' of said yoke, agtrigger r pivoted to saidstock andfnormally,engaging- V d said'V sear blockto @hold the I Valve rodinthe retracted po'sitiongandl a safetys'pring nor-'j lnally pressing saidjvalve -rod,` rearward. in Y saidyoke-Y'tokee'p the valve clos'ed,bu`t' yield-- ing 'tof open saidivalv'e lwhen'th'e pressure' in 'the' barrel becomes` excessive. if

c.` A pneematiegun for cleaning at tubes of boilers, comprising a cylindrical barrel with-f means forrsupplying compressed air to V same, Va -head mounted in'gone `end` of said barrel and 'provided witha'nozzle', a flexible hose connected to Asaidznozzfle and'rrprovid'ed at its outer'end with ataperednozzle .adapt-l.

ed .to fit in the tube to'fbe` cleaned, asecond 'i Y head closing the opposite' end of'saidbarrel' and V.provided with'afpackinggland, a stockl Y connected to Ysaid second head,'a'valve rodfy passing through said barrelandsaid gland," i a valvemounted ony said rod nearfone en-d51 Y .Y thereof and adapted to clo'sesaidfnozzle', a t I yoke having across bar slidably mounted on said rod near', the 1 other end thereof, a

notched sear block `iournaled in said stockvV j and pivotally conn'ectedto the armsof said-2i Y yoke, a triggerpivotedtosaidY stock 'andv n normallyY engaging said-.sear'blockto- .hold 'i theV valveY rod. in the retracted position',

andrajsafety spring normally pressing sfaidf cessive, the said. safety spring pressing 'llorvalve rod. rearward in saidfyokeito keepzth'ei-Z i -jvalve closed,- butyield-ingtoopen' said valve 'e when the pressure in thelbarrelfbeconieslexfV lfl wards on said cross bar, '.jwitlij 'a cushion springengagingfthe Yopposite side o;t saidY A cross bar, t lessen the shock when saidftrig `Y under pnenmatic pressure; f'

VVgeris released and; said vvalve flies vvforward f A f7. pneumaticjgun 'o'rcleaningouttubesi Y of boilers, comprising a cylindrical# barrel f with means for supplying compressed air Y to"V y' barreland provided Ywithfanozzle, ajflexible.ialrmf'v L .hose connected to Said nozzle and provided at its outer end with a tapered nozzle adapted to lit in the tube to be cleaned, a second v head closing the opposite end of said barrel andprovided with a packing gland, a stock connected to said, second head, a valve rod Y passing through said barrel and said gland,

the valve rod in the retracted position, a vcooking bar adapted` to rock said seal' block to the cocked position, and a safety spring normally pressing said valve rod rearward In said yoke to keep the valve closed, but yielding to open said valve when ytliepressure in the barrel becomes excessive.

8. Apneumatic gun for cleaning out tubes of boilers, comp-rising a cylindrical barrel with means for supplying compressed air to same, a head mounted in one end of said barrel and provided with a nozzle, a exible hose connected to said nozzle and provided connected to. said second head, a valve rod` passing through said barrel and said gland,

a valve mounted onsaid rod near one end thereof and adapted toV close said nozzle,}a yoke having a cross barslidablyymountedon said rod near the other end thereof, a notched sear block journaled in said. stock and pivotally connected: to ythe arms of said yoke, a trigger pivoted to said stock` and normally engaging said sear block to hold the valve rod in the retracted position, a cooking bar adapted to rock said sear block to the cocked position. andy a safety spring normally pressing said valve rod rearward in said yoke to keep the valve closed,`but

yielding to open said `valve when the pressure in the barrel'beconies excessive, the saidsafety spring pressing forwardson, said cross bar, with a cushion spring engaging the opposite side of said cross bar, to lessen the shock when said trigger is released and t said valve flies forward under `pneumatic pressure.

CHS'. vLOUIS CORNE. 

